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Finding the Fourth Proportional to 382,719.31, 528,217.41 and 221,672.41

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Solution

The fourth proportional to 382,719.31, 528,217.41 and 221,672.41 is: 305,945.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,719.31 : 528,217.41 = 221,672.41 : x
  2. Step 2: Convert to fraction form
    382,719.31/528,217.41 = 221,672.41/x
  3. Step 3: Cross multiply
    382,719.31x = 528,217.41 × 221,672.41
  4. Step 4: Simplify right side
    382,719.31x = 117,091,226,278.66
  5. Step 5: Solve for x
    x = 117,091,226,278.66/382,719.31
  6. Step 6: Final answer
    x = 305,945.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.